Microstructure And Mechanical Properties Of
Cold Extruded, Cellular TRIP-matrix Composite
Structures Under Quasi-static
And Dynamic Compression
Author(s)
L. Krüger, D. Ehinger, U. Martin, S. Martin, C. Weigelt
& C. G. Aneziris
Abstract
Novel composites based on austenitic stainless TRIP steel AISI 304 as a matrix
with reinforcements of MgO partially stabilized zirconia (Mg-PSZ) were
developed. The presented honeycomb materials were produced by a modified
ceramic extrusion technology that is composed of mixing precursor powders
with binders, paste preparation and plastic molding, finally debinding and
sintering. After processing, sintered products have a global density in the range
of 2.7 to 3.0 g cm-3 and a wall thickness of 260 μm. These square-celled
honeycomb samples are characterized by optical and scanning electron
microscopy before and after quasi-static or dynamic compressive deformation,
indicating a noticeable deformation-induced martensite formation. The
mechanical properties of samples with up to 10% Mg-PSZ are compared with
zirconia-free samples in terms of compression tests at strain rates in the range of
10-3 to 102 s-1. The honeycomb composite materials exhibit an increased work
hardening and also extraordinary high specific energy absorption per unit mass
and unit volume, respectively. According to improved property-weight-ratio and
excellent crashworthiness, such filigree cellular structures can be beneficial as
Keywords
honeycomb, composite, out-of-plane compression, energy absorption
Related Book
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